/*****************************************************************************
 *   Copyright 2005 Tim A Wang
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 *
 ****************************************************************************/
package com.jb.framework.util;


/**
 * XML string utility
 *
 * @author anping wang
 * @version 1.0
 */
public class XMLUtil {
    /**
     * Decodes an encoded xml string into to Java string
     *
     * @param value String value to be encoded
     *
     * @return encoded XML safe string. If value passed in is null, null is
     *         returned.
     */
    public static String decodeXMLSafe(String value) {
        if (value == null) {
            return null;
        }

        String old = value;
        old = old.replaceAll("&amp;", "&");
        old = old.replaceAll("&quot;", "\"");
        old = old.replaceAll("&lt;", "<");
        old = old.replaceAll("&gt;", ">");

        return old;
    }

    /**
     * Encodes a string into a xml compliant string.
     *
     * @param value String value to be encoded
     *
     * @return encoded XML safe string. If value passed in is null, null is
     *         returned.
     */
    public static String encodeXMLSafe(String value) {
        if (value == null) {
            return null;
        }

        String old = value;

        old = old.replaceAll("&", "&amp;");
        old = old.replaceAll("\"", "&quot;");
        old = old.replaceAll("<", "&lt;");
        old = old.replaceAll(">", "&gt;");

        return old;
    }
}
